There is some frequency drifting on the order of +/- 20 Hz, but I wanted to see how well the receiver would hold up decoding WSPR stations on the band. Below is a capture of the WSJT-X 1.6.0-devel waterfall showing WSPR signals:

Despite the less-than-perfect stability, there have been numerous decodes as seen in the WSPRnet.org database listing: